According to that wiki link you provided, a recent study determined that all North American cougars (Western, Eastern and Floridian) are all one subspecies separated only by geography, not genetics. "The researchers found that "Nittany Lions are not more similar to each other than to individuals from the Western U.S. and Florida", which only strengthens the position that all North American cougars are a single subspecies." Here's a link to the actual study, which suggests that the sample size from the Western cougar was not large enough to actually make that definitive conclusion.
https://www.biorxiv.org/content/bior...14510.full.pdf